2006•Cehui kexueRequires access

Study on ocean vertical deflection of ENVISAT satellite altimetry along-track geoid gradient

Lelin Xing

Abstract

Ocean vertical deflection is analyzed using ENVISAT along-track geoid gradient data by means of least square.Firstly an approximative geoid is obtained by editing ENVISAT altimeter data and geophysics correction.Then the along-track geoid gradient and the average of grid vertical deflection are calculated.Finally the vertical deflection of Chinese south sea(4°～25°N,104°～120°E)is got with resolution of 5°×5°.The accuracy is better than 7″.Its efficiency is proved by comparing it with the model of EGM96.

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Key concepts: Geoid, Geodesy, Vertical deflection, Altimeter, Geology, Satellite altimetry, Ocean surface topography, Satellite